Hi. I am the original author of WebInject. The website (webinject.org) is currently outdated. The best place to get info is via CPAN and the new maintainer. There is also a discussion group (http://groups.google.com/group/webinject) that the new maintainer responds on. (perhaps you could re-post over there?)

I apologize for the state of the WebInject 1.4 source code :) I originally wrote it nearly a decade ago as a novice Perl hacker. It's a little mind-boggling. I have since moved on to other languages, but I still have fond memories of the Perl community.